Safety Profile of Venturi Versus Peristaltic Phacoemulsification Pumps in Cataract Surgery Using a Capsular Surrogate for the Human Lens

Gilbert, Michael; Zaugg, Brian; Olson, Randall J.

doi:10.1016/j.ajo.2015.04.017

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…Each has its pros and cons with a similar safety pro le in terms of risk for posterior capsular rent. (13) In this survey, the peristaltic pump was more popular (56.1%) compared to the venturi system (43.9%). There is a different approach in nucleofractis technique.…”

Section: Discussionmentioning

confidence: 77%

Preferred Cataract Surgery Practices in Malaysia: A Survey of Malaysian Young Ophthalmologists Special Interest Group 2021

Wai

Chong

Lim

et al. 2022

Preprint

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Background: To describe the preferred cataract surgery practices among Malaysian ophthalmologists and medical officers in comparison with the recommended practices. Methods: An online questionnaire was sent out in April 2021, to Malaysian Ophthalmologists and medical officers who perform cataract surgeries. The questions were focused on the preferred cataract surgery practices of the participants. All data obtained were collected, tabulated and analysed. Results: A total of 173 participants responded to the online questionnaire. 55% of the participants were within 31–40 years of age. 56.1% preferred peristaltic pump over venturi system. 91.3% of participants practised povidone iodine instillation to the conjunctival sac. With regards to the main wound incision, more than half of the surgeons (50.3%) preferred fixed superior incision and 72.3% of them preferred 2.75mm microkeratome blade. Most of the participants (63%) were inclined towards C-Loop clear intraocular lens (IOL) with a single-handed push preloaded system. 78.6% of the surgeons routinely use carbachol in their cataract surgery. Conclusions: This survey provides some insight into the current practices among Malaysian ophthalmologists. Most of the practices are in line with international guidelines for preventing postoperative endophthalmitis. This article could help trainees and ophthalmologists benchmark and observe the common cataract surgery practices among their seniors and peers in Malaysia.

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Section: Discussionmentioning

confidence: 77%

Preferred Cataract Surgery Practices in Malaysia: A Survey of Malaysian Young Ophthalmologists Special Interest Group 2021

Wai

Chong

Lim

et al. 2022

Preprint

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show abstract

“…Another study showed that a 0.9 mm, 30-degree angled tip is most efficient when compared to similar 1.1 mm and 0.7 mm tips [8]. This is just a sampling of the many papers that have clarified clinical arguments about superiority in instrumentation definitively and for the first time [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Figure 1: Effect of time on efficiency using the humidity chamber method.…”

Section: Discussionmentioning

confidence: 99%

A Comparison of Porcine Lens Storage Methods for Optimal Phacoemulsification

Christensen¹,

Vegunta²

2016

J Clin Exp Ophthalmol

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Objective: The study purpose was to compare effects of two porcine lens storage methods on phacoemulsification efficiency and chatter.Methods: This in vitro laboratory study was conducted at the John A. Moran Eye Center Laboratories, University of Utah. Porcine nuclei were fixed in 10% formaldehyde and cut into 2.0 mm cubes. An equal number of lens cubes either were stored in a 100% humidity chamber or were partially immersed in balanced salt solution (BSS). Using identical parameters on the phacoemulsification machine, 40 lenses that underwent each storage method were phacoemulsified every two hours for a total of ten hours.Results: Lenses stored in the 100% humidity chamber experienced a 2.25% increase in efficiency per hour (r 2 =0.1922; p=0.3846), while lenses stored partially immersed in BSS experienced a 1.30% increase in efficiency per hour (r 2 =0.4084; p=0.1719). Although we found no statistically significant difference between the two groups, the partially immersed lenses were consistently softer than the lenses that were kept in the 100% humidity chamber. Chatter was minimal throughout the testing, but showed an increase over time. Conclusion:Either the 100% humidity chamber or the partially submerged method can be used for lens storage. Despite some differences between the two storage methodologies, the differences were not statistically significant. We conclude that using either method results in a natural softening of the lenses over time which must be taken into consideration during future experiments. This necessitates the testing time to be as short as possible.

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“…2,3 Novel modifications of pump functionality seek to incorporate the advantages of both pump modalities to provide surgeons with more options for a variety of surgical scenarios. 4 One such modification developed by Oertli (Oertli Instrumente AG, Berneck, Switzerland) uses a novel Speed and Precision (SPEEP) peristaltic pump which allows the surgeon control of both aspiration flow rate and vacuum pressure during surgery with the foot pedal. 3 Conventional peristaltic systems are generally controlled with a foot pedal that can be depressed to 3 different positions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Modified Peristaltic Phacoemulsification Device on Efficiency and Post-Occlusion Pressure Surge

Ricks,

Cardenas,

Ungricht

et al. 2023

OPTH

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To evaluate efficiency of grooving, nuclear fragment removal, and changes in pressure control in the Oertli Faros using traditional peristaltic and Speed and Precision (SPEEP) features. The SPEEP mode uses novel peristaltic technology permitting independent control of flow and vacuum. Methods: A porcine lens model was used with an enclosed chamber simulating the anterior segment. Grooving efficiency is evaluated with flow rates of 10, 30, and 50 mL/min using whole lenses. Lens cubes were emulsified at 20, 40, 60, 80, and 100% power with both SPEEP and non-SPEEP modes. Surge was evaluated with pressure gauges placed on the irrigation tubing and aspiration tubing. Pressure readings were recorded per the following: fluid and vacuum were initiated for 15 seconds, vacuum tubing was occluded for 5 seconds, tubing patency was then re-introduced for 15 seconds. Differences between sensors were recorded. Results: No significant increase in efficiency was seen with increasing flow rate from 30 to 50 mL/min using SPEEP. No significant differences were shown in lens fragment removal in SPEEP and non-SPEEP modes at any power tested. Pressure difference measurements were not significantly different with SPEEP and non-SPEEP modes. Conclusion:We showed that lower flow rates show comparable efficiency of grooving when using the SPEEP mode. The SPEEP function did not show increased efficiency in nuclear fragment removal when compared to traditional mode. Surge control was also comparable with both SPEEP and non-SPEEP modes. We suggest that the SPEEP function included in the Oertli Faros may have some advantages.

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Safety Profile of Venturi Versus Peristaltic Phacoemulsification Pumps in Cataract Surgery Using a Capsular Surrogate for the Human Lens

Cited by 8 publications

References 21 publications

Preferred Cataract Surgery Practices in Malaysia: A Survey of Malaysian Young Ophthalmologists Special Interest Group 2021

Preferred Cataract Surgery Practices in Malaysia: A Survey of Malaysian Young Ophthalmologists Special Interest Group 2021

A Comparison of Porcine Lens Storage Methods for Optimal Phacoemulsification

Effect of Modified Peristaltic Phacoemulsification Device on Efficiency and Post-Occlusion Pressure Surge

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